Technicians working in the Propulsion Systems Laboratory (PSL)
Technicians in Propulsion Systems Laboratory (PSL) No. 1 connect wiring on a Pratt & Whitney F-100 engine. (2/14/1978)
Image Credit: NASA/MARTIN BROWN
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https://www.nasa.gov/image-detail/grc-1978-c-00476/
Image CreditNASA/MARTIN BROWN
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